You may receive important communications from the USPTO. If via regular mail, they will have an official USPTO seal. If via email, they will always come from an address including "@uspto.gov." Ensure that emails are NOT treated as spam. Also, if your emails address changes, you must update the USPTO records with the new address. You should monitor the status of your application at least every 3-4 months after any filing to avoid missing any critical filing deadlines.
Pay maintenance fees and learn more about filing fees and other payments
Notices of possible system outages